Hair volumizing treatments with in situ diagnostic assessment and formula dispensing

A diagnostic formula applicator, comprising:

• a fluid dispensing assembly coupled with a comb having a plurality of tines, wherein a tine of the plurality of tines is configured to dispense a fluid formula to a region of a biological surface, via at least one fluid conduit;
• and
• hair diagnostic circuitry operably coupled to the fluid dispensing assembly, the diagnostic circuitry configured to actuate the fluid dispensing assembly to deliver the fluid formula via the at least one fluid conduit, responsive to determining a user-specific hair cosmetic aspect from hair and scalp sensor information, wherein the hair diagnostic circuitry is operably coupled with a radiation sensor, and
• the diagnostic formula applicator further comprising one or more non-transitory memory devices storing computer-readable instructions that, when executed by the hair diagnostic circuitry, cause the hair diagnostic circuitry to perform operations comprising:
• generating an image of the region of the biological surface using the radiation sensor, the region comprising skin, hairs, and hair follicles;
• attributing the user-specific hair cosmetic aspect to the region of the biological surface using the image;
• and
• dispensing the fluid formula to the region via the conduit using the fluid dispensing assembly, based at least in part on the one or more cosmetic aspects.